/* ==========================================================================
   headroom.fm — marketing site
   One hand-written stylesheet, shared by every page. No frameworks.
   Design language: studio hardware. Matte black panels, hairline rules,
   mono silkscreen labels, green reserved for signal (money, live, go).
   ========================================================================== */

:root {
  color-scheme: dark;

  /* palette */
  --bg: #0D0D0D;
  --panel: #121212;
  --panel-2: #161616;
  --line: #232323;
  --line-soft: #1A1A1A;
  --ink: #EDEDEC;
  --body: #A6A6A6;
  --dim: #6E6E6E;
  --faint: #3E3E3E;
  --green: #22C55E;
  --green-down: #1CA850;
  --green-glow: rgba(34, 197, 94, 0.12);
  --amber: #F5A524;
  --red: #FF3B30;

  /* type */
  --sans: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;

  /* rhythm */
  --wrap: 1120px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --sect: clamp(4.5rem, 10vw, 7.5rem);
  --radius: 0.65rem;
}

* { margin: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--body);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }

a { color: inherit; }

::selection { background: var(--green); color: var(--bg); }

:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.wrap--narrow { max-width: 860px; }

/* --------------------------------------------------------------------------
   Type
   -------------------------------------------------------------------------- */

h1, h2, h3 { color: var(--ink); font-weight: 650; letter-spacing: -0.025em; }

.display {
  font-size: clamp(2.1rem, 4.8vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 700;
  text-wrap: balance;
}

/* stacked multi-sentence hero (index): a notch smaller so lines hold their shape */
.display--stack { font-size: clamp(1.9rem, 3.2vw, 2.6rem); }

.h2 {
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.15;
  text-wrap: balance;
}

.h3 { font-size: 1.125rem; line-height: 1.35; }

.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.6;
  max-width: 36em;
}

.payoff { color: var(--ink); font-weight: 600; }

/* Silkscreen label: the mono eyebrow used on every section */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--green);
}
.eyebrow--dim { color: var(--dim); }

.fine {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}

/* --------------------------------------------------------------------------
   Buttons + links
   -------------------------------------------------------------------------- */

.btn {
  display: inline-block;
  background: var(--green);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  white-space: nowrap;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius);
  transition: background 0.15s ease, transform 0.15s ease;
}
.btn:hover { background: var(--green-down); }
.btn:active { transform: translateY(1px); }

.btn--lg { padding: 0.95rem 2.2rem; font-size: 1.05rem; }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line);
}
.btn--ghost:hover { background: var(--panel-2); }

.textlink {
  color: var(--ink);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-underline-offset: 4px;
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}
.textlink:hover { color: var(--green); text-decoration-color: var(--green); }

/* --------------------------------------------------------------------------
   Header / footer
   -------------------------------------------------------------------------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 13, 13, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 0.95rem;
}
.site-head .logo img { height: 1.65rem; }
.site-nav { display: flex; align-items: center; gap: 1.6rem; }
.site-nav a:not(.btn) {
  color: var(--body);
  font-size: 0.92rem;
  text-decoration: none;
  transition: color 0.15s ease;
}
.site-nav a:not(.btn):hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav .btn { padding: 0.55rem 1.15rem; font-size: 0.9rem; }

.site-foot { border-top: 1px solid var(--line-soft); padding-block: 2.25rem; }
.site-foot .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
}
.site-foot .copy { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; color: var(--faint); }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 1.4rem; }
.site-foot nav a {
  color: var(--dim);
  font-size: 0.85rem;
  text-decoration: none;
}
.site-foot nav a:hover { color: var(--ink); }

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.sect { padding-block: var(--sect); border-top: 1px solid var(--line-soft); }
.sect--flush { border-top: 0; }

/* mono index that opens a section, e.g. "01 / bookings" */
.sect-id {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}
.sect-id .no { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--green); }
.sect-id .of { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.28em; text-transform: uppercase; color: var(--dim); }

/* --------------------------------------------------------------------------
   Panels (the hardware surface)
   -------------------------------------------------------------------------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), 0 24px 60px rgba(0, 0, 0, 0.35);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero { padding-block: clamp(4rem, 9vw, 7rem) clamp(4rem, 9vw, 6.5rem); }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}
.hero-copy > * + * { margin-top: 1.4rem; }
.hero-copy .display span { display: block; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; }
.hero .fine { margin-top: 1.1rem; }

/* ---- the headroom meter ---- */

.meter-rig {
  --mh: clamp(280px, 36vh, 380px);
  --scl: 2.2rem;                        /* dB scale column */
  --lbl: clamp(110px, 12vw, 150px);     /* label column */
  display: flex;
  justify-content: center;
  gap: 1.1rem;
  user-select: none;
}
.m-scale {
  position: relative;
  width: var(--scl);
  height: var(--mh);
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--faint);
}
.m-scale span {
  position: absolute;
  right: 0;
  transform: translateY(-50%);
  padding-right: 0.7rem;
}
.m-scale span::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  width: 0.4rem;
  border-top: 1px solid var(--faint);
}
.m-col { display: flex; flex-direction: column; align-items: center; gap: 0.7rem; }
.meter {
  position: relative;
  width: clamp(64px, 7vw, 88px);
  height: var(--mh);
  border-radius: 0.55rem;
  background: #131313;
  box-shadow: inset 0 0 0 1px #222, inset 0 2px 16px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}
.m-fill {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 65%;
  background: var(--green);
  transform-origin: bottom;
  animation: m-rise 1.3s cubic-bezier(0.22, 0.7, 0.2, 1) 0.4s both;
}
@keyframes m-rise { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.m-knee {
  position: absolute;
  left: 0; right: 0;
  bottom: 65%;
  border-top: 1px dashed rgba(255, 255, 255, 0.16);
}
.m-cap { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.24em; color: var(--faint); }

.m-labels { position: relative; height: var(--mh); width: var(--lbl); }
.m-lab {
  position: absolute;
  left: 0; right: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.15rem;
  padding-left: 0.9rem;
}
.m-lab::before {
  content: '';
  position: absolute;
  left: 0;
  width: 1px;
  background: var(--faint);
}
.m-lab--head { top: 0; height: 35%; }
.m-lab--head::before { top: 0; bottom: 0.75rem; }
.m-lab--sig { bottom: 0; height: 65%; }
.m-lab--sig::before { top: 0.75rem; bottom: 0; }
.m-lab .m-tag {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--green);
}
.m-lab--sig .m-tag { color: var(--dim); }
.m-lab .m-txt { font-family: var(--mono); font-size: clamp(0.8rem, 1.4vw, 0.95rem); line-height: 1.35; color: #fff; }
.m-lab--sig .m-txt { color: var(--dim); }

/* --------------------------------------------------------------------------
   Activity feed vignette
   -------------------------------------------------------------------------- */

.feed { overflow: hidden; }
.feed-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim);
}
.feed-head .live { color: var(--green); }
.feed-head .spacer { flex: 1; }
.dot {
  width: 0.5rem; height: 0.5rem;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 10px rgba(34, 197, 94, 0.7);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.45; } }

.feed ol { list-style: none; padding: 0; }
.feed li {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  padding: 0.85rem 1.25rem;
}
.feed li + li { border-top: 1px solid var(--line-soft); }
.feed time {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--faint);
  white-space: nowrap;
  min-width: 4.2rem;
}
.feed p { flex: 1; font-size: 0.92rem; color: var(--body); }
.feed p strong { color: var(--ink); font-weight: 500; }
.feed .amt { font-family: var(--mono); font-size: 0.8rem; color: var(--green); white-space: nowrap; }
.feed .amt--out { color: var(--dim); }

.badge {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  white-space: nowrap;
}
.badge--ok { color: var(--green); border-color: rgba(34, 197, 94, 0.35); background: var(--green-glow); }

/* two-column story: copy beside a vignette */
.story {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}
.story-copy > * + * { margin-top: 1.1rem; }

/* --------------------------------------------------------------------------
   Pillars (index) and feature groups (features page)
   -------------------------------------------------------------------------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(2rem, 4vw, 3.5rem);
}
.pillar .no {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--green);
  display: block;
  margin-bottom: 0.9rem;
}
.pillar h3 { margin-bottom: 0.65rem; font-size: 1.25rem; text-wrap: balance; }
.pillar > p { font-size: 0.95rem; }
.pillar ul { list-style: none; padding: 0; margin-top: 1.25rem; }
.pillar li {
  padding: 0.55rem 0;
  border-top: 1px solid var(--line-soft);
  font-size: 0.9rem;
  color: var(--dim);
}
.pillar li:last-child { border-bottom: 1px solid var(--line-soft); }

/* features page: label column + item list */
.fgroup {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(1.75rem, 4vw, 4rem);
  padding-block: clamp(2.25rem, 5vw, 3.5rem);
}
.fgroup + .fgroup { border-top: 1px solid var(--line-soft); }
.fgroup-head .no {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--green);
  display: block;
  margin-bottom: 0.8rem;
}
.fgroup-head h2 { font-size: clamp(1.3rem, 2.2vw, 1.6rem); margin-bottom: 0.6rem; }
.fgroup-head p { font-size: 0.95rem; }
.fgroup ul { list-style: none; padding: 0; }
.fgroup ul li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.4rem;
  font-size: 0.95rem;
}
.fgroup ul li + li { border-top: 1px solid var(--line-soft); }
.fgroup ul li::before {
  content: '';
  position: absolute;
  left: 0.15rem;
  top: 1.18rem;
  width: 0.45rem;
  border-top: 1px solid var(--green);
}

/* spec-sheet grid: the deeper capabilities, one line each */
.rack {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 clamp(2rem, 4vw, 3.5rem);
}
.rack > div { padding: 1.1rem 0 1.2rem; border-top: 1px solid var(--line-soft); }
.rack h3 { font-size: 0.95rem; margin-bottom: 0.3rem; }
.rack p { font-size: 0.85rem; color: var(--dim); }
.rack + .textlink-row { margin-top: 2.25rem; }

/* --------------------------------------------------------------------------
   Signal chain (widget page)
   -------------------------------------------------------------------------- */

.chain {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.chain > div { background: var(--panel); padding: 1.6rem 1.5rem 1.7rem; }
.chain .stage {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--dim);
  display: block;
  margin-bottom: 0.9rem;
}
.chain h3 { font-size: 1.05rem; margin-bottom: 0.45rem; }
.chain p { font-size: 0.9rem; }

/* before/after leak rows */
.leak { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.leak + .leak { margin-top: 1rem; }
.leak .was {
  padding: 0.9rem 1.35rem;
  background: #101010;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.88rem;
  color: var(--dim);
  text-decoration: line-through;
  text-decoration-color: var(--faint);
}
.leak .now { padding: 0.95rem 1.35rem; font-size: 0.95rem; color: var(--ink); }
.leak .now strong { color: var(--green); font-weight: 600; }

/* without / with panels */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.duo > div { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem 1.5rem 1.6rem; }
.duo .tag {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.8rem;
  color: var(--dim);
}
.duo p { font-size: 0.92rem; }
.duo .with { border-color: rgba(34, 197, 94, 0.4); background: linear-gradient(180deg, rgba(34, 197, 94, 0.05), transparent 60%); }
.duo .with .tag { color: var(--green); }
.duo .with p { color: var(--body); }

/* numbered steps (widget funnel) */
.steps { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 3vw, 2.5rem); }
.step .no { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--green); display: block; margin-bottom: 0.7rem; }
.step h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.step p { font-size: 0.92rem; }

/* --------------------------------------------------------------------------
   Compare page
   -------------------------------------------------------------------------- */

.only { display: grid; grid-template-columns: 1fr 1fr; gap: 0 clamp(2rem, 5vw, 4rem); }
.only > div { padding: 1.35rem 0; border-top: 1px solid var(--line-soft); }
.only h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.only h3::before {
  content: attr(data-no);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--green);
  margin-right: 0.8rem;
}
.only p { font-size: 0.9rem; }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}
.legend span { display: inline-flex; align-items: center; gap: 0.6rem; }

.cmp-block + .cmp-block { margin-top: clamp(2.5rem, 5vw, 3.5rem); }
.cmp-block > h2 { font-size: 1.15rem; margin-bottom: 1rem; }
.tscroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.cmp { width: 100%; min-width: 640px; border-collapse: collapse; font-size: 0.88rem; }
.cmp th {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--line);
  text-align: center;
  white-space: nowrap;
}
.cmp th:first-child { text-align: left; width: 34%; }
.cmp th:nth-child(2) { color: var(--green); }
.cmp td { padding: 0.7rem 0.9rem; text-align: center; }
.cmp td:first-child { text-align: left; color: var(--body); }
.cmp tbody tr + tr td { border-top: 1px solid var(--line-soft); }
.cmp th:nth-child(2), .cmp td:nth-child(2) { background: rgba(34, 197, 94, 0.045); }

/* marks: drawn in CSS, no icon library */
.mk { display: inline-block; vertical-align: middle; }
.mk--yes {
  width: 0.68rem; height: 0.34rem;
  border-left: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  transform: rotate(-45deg) translateY(-0.1rem);
}
.mk--part { width: 0.4rem; height: 0.4rem; border-radius: 999px; background: var(--dim); }
.mk--no { width: 0.6rem; border-top: 1px solid var(--faint); }

/* --------------------------------------------------------------------------
   CTA band
   -------------------------------------------------------------------------- */

.cta-band { text-align: center; }
.cta-band .h2 { margin-bottom: 0.9rem; }
.cta-band p { max-width: 34em; margin-inline: auto; }
.cta-band .btn { margin-top: 2rem; }
.cta-band .fine { margin-top: 1.4rem; }
.cta-band .fine a { color: inherit; text-decoration: none; }
.cta-band .fine a:hover { color: var(--ink); }

/* --------------------------------------------------------------------------
   Legal prose
   -------------------------------------------------------------------------- */

.prose { max-width: 720px; }
.prose h1 { font-size: clamp(1.9rem, 3.5vw, 2.6rem); margin-bottom: 0.4rem; }
.prose .updated { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin-bottom: 3rem; }
.prose section + section { margin-top: 2.4rem; }
.prose h2 { font-size: 1.15rem; margin-bottom: 0.7rem; }
.prose p + p, .prose p + ul, .prose ul + p { margin-top: 0.7rem; }
.prose ul { padding-left: 1.2rem; }
.prose li + li { margin-top: 0.35rem; }
.prose li::marker { color: var(--faint); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--green); text-decoration: none; }
.prose a:hover { text-decoration: underline; }

/* --------------------------------------------------------------------------
   Pricing page
   -------------------------------------------------------------------------- */

/* calculator */
.calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); }
.calc-controls { padding: 1.1rem 1.75rem 1.4rem; border-right: 1px solid var(--line); }
.ctl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding-block: 1.05rem;
}
.ctl + .ctl, #c-locrows + .ctl, .ctl + #c-locrows > .ctl:first-child { border-top: 1px solid var(--line-soft); }
.ctl--sub { padding-block: 0.6rem; }
.ctl--sub .ctl-label { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); font-weight: 400; padding-left: 1rem; border-left: 1px solid var(--line-soft); }
.ctl-label { color: var(--ink); font-weight: 500; font-size: 0.95rem; }
.ctl-label small { display: block; font-size: 0.78rem; color: var(--dim); font-weight: 400; margin-top: 0.1rem; }

.stepper { display: flex; align-items: center; }
.stepper button {
  width: 2.15rem;
  height: 2.15rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.stepper button:hover:not(:disabled) { border-color: var(--dim); }
.stepper button:disabled { opacity: 0.35; cursor: default; }
.stepper output { min-width: 2.6rem; text-align: center; font-family: var(--mono); font-size: 1.05rem; color: var(--ink); }

.locrow-x {
  background: none;
  border: 0;
  margin-left: 0.5rem;
  padding: 0.25rem 0.35rem;
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--faint);
  cursor: pointer;
  transition: color 0.15s ease;
}
.locrow-x:hover { color: var(--red); }

.seg { display: flex; border: 1px solid var(--line); border-radius: 0.45rem; overflow: hidden; }
.seg button {
  background: transparent;
  border: 0;
  padding: 0.55rem 0.95rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--green-glow); color: var(--green); }
.seg button[aria-pressed="false"]:hover { color: var(--ink); }

.switch {
  appearance: none;
  -webkit-appearance: none;
  width: 2.7rem;
  height: 1.5rem;
  border-radius: 999px;
  background: var(--faint);
  position: relative;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s ease;
}
.switch::after {
  content: '';
  position: absolute;
  top: 0.2rem;
  left: 0.2rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 999px;
  background: var(--ink);
  transition: transform 0.15s ease, background 0.15s ease;
}
.switch:checked { background: var(--green); }
.switch:checked::after { transform: translateX(1.2rem); background: var(--bg); }

.calc-out { padding: 1.75rem 1.75rem 1.9rem; display: flex; flex-direction: column; }
.calc-lines { list-style: none; padding: 0; flex: 1; }
.calc-lines li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
  font-size: 0.92rem;
  color: var(--body);
}
.calc-lines li + li { border-top: 1px solid var(--line-soft); }
.calc-lines .amt { font-family: var(--mono); font-size: 0.8rem; color: var(--dim); white-space: nowrap; }
.calc-lines .disc, .calc-lines .disc .amt { color: var(--green); }
.calc-total {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-top: 1.4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}
.calc-total .was { font-family: var(--mono); font-size: 1rem; color: var(--faint); text-decoration: line-through; }
.calc-total strong { font-family: var(--mono); font-weight: 500; font-size: 2.2rem; letter-spacing: -0.02em; color: var(--green); }
.calc-total .unit { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); }
.calc-year { margin-top: 0.5rem; font-size: 0.92rem; color: var(--body); }
.calc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.75rem;
  margin-top: 0.5rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}

@media (max-width: 860px) {
  /* readout first on phones so the price is visible while adjusting */
  .calc { grid-template-columns: 1fr; }
  .calc-out { order: -1; border-bottom: 1px solid var(--line); }
  .calc-controls { border-right: 0; }
}

/* --------------------------------------------------------------------------
   Motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .m-fill { animation: none; }
  .dot { animation: none; }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .rack { grid-template-columns: 1fr 1fr; }
  /* The rig's flex box is right-heavy (labels are wider than the dB scale),
     so a plain center puts the meter left of screen center. Shift by half
     the difference so the meter itself is what's centered. */
  .hero-visual { display: flex; justify-content: center; }
  .hero-visual .meter-rig { transform: translateX(calc((var(--lbl) - var(--scl)) / 2)); }
  .story { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: 1fr; gap: 2.5rem; }
  .fgroup { grid-template-columns: 1fr; gap: 1.25rem; }
}

@media (max-width: 720px) {
  .site-nav { gap: 1.1rem; }
  .site-nav a[data-optional] { display: none; }
  .chain { grid-template-columns: 1fr; }
  .rack { grid-template-columns: 1fr; }
  .duo { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .only { grid-template-columns: 1fr; }
  .feed li { flex-wrap: wrap; gap: 0.35rem 1rem; }
  .feed p { flex-basis: 100%; order: 3; }
}